Güneş Ekspress Havacılık A.Ş, Operating as SunExpress, is a regional operator based out of Antalya Airport, Turkey. The airline was launched in 1989 as a joint venture between state carriers Lufthansa and Turkish Airlines, each of whom retain a 50% stake. Operations commenced the following year, in the form of a charter flight between Antalya and Frankfurt. Shortly after, scheduled flights were launched with a small fleet of Boeing aircraft.

Since its inception, SunExpress has undertaken significant growth of its fleet and route network and now offers services to many Turkish and regional destinations. During March 2010, SunExpress took over the first of several AnadoluJet aircraft and commenced operating on behalf of AnadoluJet. It is important to note that AnadoluJet does not have its own individual Air Operating Certificate (AOC). The airline's operations are almost exclusively undertaken by SunExpress under the operating license of SunExpress. In 2011, SunExpress, launched its sister subsidiary airline, SunExpress Germany (Deutschland GmbH). This airline operates under its own Air Operator’s Certificate and is classed as a separate entity.

In early 2017, SunExpress operated a young fleet of Boeing 737 series aircraft with an average age just over five years. Furthermore, the airline has placed orders for an additional 37 aircraft, indicating it likely has access to sufficient financial resources.

On the 17th March 2017, a REX Regional Express Saab 340B (REG. VH-NRX) was performing a scheduled flight from Albury Airport to Sydney Airport. As the aircraft was descending towards its destination, the right hand propeller separated from the engine mounting. The flight crew we able to maintain control of the aircraft and performed a safe landing approximately 25 minutes later. Following the incident, REX has announced the grounding of five additional Saab 340B aircraft of the same production series, to allow for an inspection of the engine mounting and propeller gear boxes.

The Indian Directorate General of Civil Aviation had launched an investigation to examine the engine types used on the new Airbus A320neo (New engine option) fitted on a number of Indian airline fleets. Following a number a number of incidents involving the Pratt and Whitney engines (P&W), both IndiGo Airlines and GoAir have been instructed by the DGCA to perform boroscopic inspections on the engines of over 20 aircraft. These inspections had initially been required after the engines had completed 1,500 flight hours; however the DGCA has asked this be performed at 1,000 hours instead. The DGCA noted that its concerns stemmed from reports that the presence of metal chips had been found within the engine oil.